James L. FranklinChicago, IL On September 21, 2009, Dr. Joseph B. Kirsner, University of Chicago Louis Block Distinguished Service Professor of Medicine, will celebrate his 100th birthday. In his centennial year, the American Gastroenterological Association Foundation for Digestive Health and Nutrition honored Dr. Kirsner with a celebratory dinner on May 29, 2009 as a part…